@article{CMFD_2006_15_a8,
     author = {A. V. Glushak and V. A. Popova},
     title = {Inverse problem for {Euler{\textendash}Poisson{\textendash}Darboux} abstract differential equation},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {126--141},
     year = {2006},
     volume = {15},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2006_15_a8/}
}